Configuring Wake on WAN (WoW) allows you to power on a turned-off or sleeping computer from anywhere in the world by sending a “Magic Packet” over the internet to your home network. Because routers inherently drop incoming broadcast packets from the internet for security, WoW requires specific motherboard, operating system, and network adjustments. Step 1: Configure the Target PC’s BIOS/UEFI
You must ensure the network interface card (NIC) receives standby power when the computer is turned off.
Enter BIOS: Restart your PC and repeatedly tap F2, Del, or F10 during boot-up.
Find Power Management: Navigate to the Advanced, Power, or APM Configuration tab.
Enable Wake Settings: Turn on options like Wake on LAN, Power On By PCI-E, or Resume by PME.
Disable ErP/Deep Sleep: Turn Off “ErP Ready” or “Deep Sleep” states, as they cut power to the Ethernet port entirely.
Save & Exit: Press F10 to save changes and boot into Windows. Step 2: Configure the Operating System (Windows)
Next, you must tell the OS not to completely shut off the network adapter and to watch for Magic Packets.
Open Device Manager: Right-click the Windows Start button and select Device Manager.
Modify Network Adapter: Expand Network adapters, right-click your primary Ethernet Controller, and select Properties.
Adjust Advanced Settings: Under the Advanced tab, enable Wake on Magic Packet and Shutdown Wake-On-Lan. Turn off any power-saving items like Energy Efficient Ethernet.
Adjust Power Management: Under the Power Management tab, check Allow this device to wake the computer and Only allow a magic packet to wake the computer.
Disable Fast Startup: Open the Windows Control Panel, navigate to Power Options > Choose what the power buttons do, click Change settings that are currently unavailable, and uncheck Turn on fast startup.
Note: Record your computer’s MAC Address and IPv4 Address before proceeding. You can find these by opening Command Prompt and typing ipconfig /all. Step 3: Configure Your Network Router
This is where Wake on LAN becomes Wake on WAN. You must route the external internet packet precisely to your turned-off computer. Method A: The Secure VPN Way (Recommended)
Exposing your network to external Magic Packets can cause security risks or crash vulnerabilities. The cleanest modern solution is setting up a VPN.
Enable a WireGuard or OpenVPN server directly inside your router settings.
When away from home, connect your smartphone or laptop to this home VPN.
Once connected, you are virtually inside your local network. You can use any standard, free Wake on LAN app to wake your computer using its local IP and MAC address without opening firewalls. Method B: The Port Forwarding Way (Traditional WoW)
If your router does not support a built-in VPN, you must explicitly direct external traffic.
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